Home / 39,631.16-54,689.55-21,725.77

Finding the Fourth Proportional to 39,631.16, 54,689.55 and 21,725.77

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Solution

The fourth proportional to 39,631.16, 54,689.55 and 21,725.77 is: 29,980.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,631.16 : 54,689.55 = 21,725.77 : x
  2. Step 2: Convert to fraction form
    39,631.16/54,689.55 = 21,725.77/x
  3. Step 3: Cross multiply
    39,631.16x = 54,689.55 × 21,725.77
  4. Step 4: Simplify right side
    39,631.16x = 1,188,172,469.05
  5. Step 5: Solve for x
    x = 1,188,172,469.05/39,631.16
  6. Step 6: Final answer
    x = 29,980.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.